M4/CQBR Clone, too soon to be retro?

**albatrossarmament** · 10-09-15, 12:33

Can we discuss this rifle? Maybe there are other, better pics floating out there of this CQBR?

**Anthony.L** · 10-09-15, 15:36

Originally Posted by albatrossarmament

Can we discuss this rifle? Maybe there are other, better pics floating out there of this CQBR?

At first glance without blowing up the image that looks like a MK18 MOD 0 config. Was there something specific you saw in the image that interest you?

**albatrossarmament** · 10-09-15, 19:47

I do not believe it is a Mk18. Can anyone tell if that is a RIS, or RAS rail? The Car15 stock makes me believe it is a M4/CQBR...LMT sight, looks like an M4 reciever as well, not A1.

If the rail is a RIS, one could argue the stock was changed out and it is a MK18...But I think it is a M4/CQBR

**Anthony.L** · 10-09-15, 20:33

To me, from here, that looks like a KAC RAS and not a DD RIS. The stocks in the field were highly variable, operators could switch them out.

**albatrossarmament** · 10-09-15, 22:00

I had to google DD RIS just to see what you were saying. The DD RIS is a block 2 rail.

What I am asking is if anyone knows if this is a KAC RIS, or KAC RAS. Everything about this rifle lends me to believe it is a M4 with CQBR upper.

**steyrman13** · 10-09-15, 22:45

Originally Posted by albatrossarmament

I had to google DD RIS just to see what you were saying. The DD RIS is a block 2 rail.

What I am asking is if anyone knows if this is a KAC RIS, or KAC RAS. Everything about this rifle lends me to believe it is a M4 with CQBR upper.

That is a KAC RAS

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**Renegade04** · 10-10-15, 12:19

Originally Posted by albatrossarmament

I do not believe it is a Mk18. Can anyone tell if that is a RIS, or RAS rail? The Car15 stock makes me believe it is a M4/CQBR...LMT sight, looks like an M4 reciever as well, not A1.

If the rail is a RIS, one could argue the stock was changed out and it is a MK18...But I think it is a M4/CQBR

The M4 carbine and M16 are not ideally suited for all missions, so it was proposed that the modularity of the M16 series would allow a user to replace the upper receiver of an existing weapon with one more suitable to the task. One of two proposed special mission receivers that were planned for inclusion into the SOPMOD Block II kit, the CQBR has taken off on its own. Like the proposed Special Purpose Receiver, the Close Quarters Battle Receiver has been more or less taken on by the Naval Surface Warfare Center, Crane Division (often referred to as NSWC-Crane or just "Crane") as its own project following the CQBR's removal from the SOPMOD program. Just as the Special Purpose Receiver morphed into the Special Purpose Rifle, and was type-classified as Mk 12 Mod 0/1, the complete CQBR-equipped carbine has been type-classified as the Mk 18 Mod 0.

The purpose of the CQBR remains to provide operators with a weapon of submachine gun size, but firing a rifle cartridge, for scenarios such as VIP protection, urban warfare, and other close quarters battle (CQB) situations. The CQBR is designed to provide improvement over previous AR-15/M16-type weapons in this category. The CQBR is usually issued as a complete weapon system, and not just an upper receiver. The CQBR was once only available to Naval Special Warfare units, but the Mk 18 Mod 0 has become general issue for Visit, Board, Search, and Seizure (VBSS) missions and, as of 2006, for NCIS agents deploying to active combat zones.[citation needed] The Mk 18 is also used by the Coast Guard's Tactical Law Enforcement Teams, Maritime Safety and Security Teams, and Maritime Security Response Team and the United States Navy's Explosive Ordnance Disposal (EOD) Operators. It is also used by Marine Force Recon's CQB operators, and is in most cases the standard weapons of choice for said operators.

The short 10.3 in (262 mm) barrel length requires special modifications to reliably function. The gas port is opened from 0.062 to 0.070 in (1.6 to 1.8 mm). A one-piece McFarland gas ring replaces the three-piece gas ring set. The standard four-coil extractor spring is replaced with a commercial off-the-shelf (COTS) five-coil spring. An O-ring surrounds the extractor spring. The standard M4 flash hider has been replaced with the M4QD flash hider for suppressor compatibility.